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Analog Devices Inc./Maxim Integrated MAX4243ESD
- Part No.:
- MAX4243ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4243ESD.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,915
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Product details
Overview
MAX4243ESD from Maxim Integrated is a dual-channel, micropower operational amplifier with shutdown control, designed for ultra-low-voltage, battery-powered systems. It operates from +1.8V to +5.5V single supply (or ±0.9V to ±2.75V dual), draws only 10µA per amplifier, features Beyond-the-Rails™ inputs (extending 200mV beyond rails), rail-to-rail outputs (within 9mV of rails at 100kΩ), and delivers 90kHz gain-bandwidth - enabling precision signal conditioning in portable medical sensors and two-cell alkaline-powered instrumentation.
For engineers reviewing the MAX4243ESD datasheet, MAX4243ESD pinout, MAX4243ESD application, or MAX4243ESD equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options - all grounded in the official MAX4240–MAX4244 family datasheet Rev 3 (9/06) and Maxim's ordering documentation.
Technical Context
The MAX4243ESD integrates two independent amplifiers in a single 14-pin SO package, each featuring a composite NPN/PNP input stage enabling a common-mode range from VEE − 0.2V to VCC + 0.2V and rail-to-rail output swing. Its shutdown pin (SHDN) reduces total supply current to ≤2.0µA (per amplifier, VCC = 1.8V) while forcing outputs into high-impedance state - critical for intermittent-sampling architectures.
It achieves 90kHz gain-bandwidth with 68° phase margin and unity-gain stability up to 200pF capacitive load, supported by low input offset voltage (±0.20mV typ at +25°C, ±1.3mV max over −40°C to +85°C), 73dB min CMRR at VCC = 1.8V, and 73dB min PSRR across full supply range - making it suitable for DC-coupled, low-drift sensor front-ends where supply rejection and input headroom are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - enables direct operation from aging two-cell alkaline (1.8V end-of-life) without regulation. |
| Supply Current per Amp | 10µA at VCC = 1.8V - supports >200,000 hours runtime on two AA alkaline cells in active mode. |
| Shutdown Current | ≤2.0µA per amplifier at VCC = 1.8V - extends system battery life during sleep intervals. |
| Input Offset Voltage | ±0.20mV (typ), ±1.3mV (max, −40°C to +85°C) - ensures sub-mV DC accuracy in strain gauge or thermistor amplification. |
| Gain-Bandwidth Product | 90kHz - sufficient for anti-aliasing filtering and low-frequency sensor signal conditioning (e.g., <10kHz ECG, pressure). |
| Output Swing | Within 9mV of rails (100kΩ load) - maximizes dynamic range in 1.8V–3.3V ADC interfaces. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - accepts signals below ground or above VCC, eliminating level-shifting in single-supply designs. |
Pinout & Package
MAX4243ESD is housed in a 14-pin SO (Small Outline) package, 150mil width, with standard JEDEC MO-153 footprint. Pin numbering follows conventional SOIC layout (pin 1 = top-left corner, notch indicator).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail voltage source/sink; high-impedance when SHDN = low. |
| 2 (IN− A) | Inverting input A | Differential node for A channel; protected by 2.2kΩ series resistors and diode clamps. |
| 3 (IN+ A) | Noninverting input A | Differential node for A channel; same protection as IN− A. |
| 4 (VEE) | Negative supply / ground | Reference for dual-supply operation or GND return path in single-supply systems. |
| 5 (IN+ B) | Noninverting input B | Differential node for B channel; electrically isolated from A channel (CHISO ≥ 80dB). |
| 6 (IN− B) | Inverting input B | Differential node for B channel; matched bias characteristics to IN− A. |
| 7 (OUT B) | Amplifier B output | Independent rail-to-rail output; high-Z during shutdown, no crosstalk to OUT A. |
| 8 (NC) | No connect | Internally unconnected; must remain floating or grounded per PCB layout best practice. |
| 9 (SHDN) | Shutdown control | Active-low logic input; VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC; drives both amps into low-power state. |
| 10 (VCC) | Positive supply | Primary power rail; bypass with 100nF capacitor to VEE for noise immunity. |
| 11 (NC) | No connect | Internally unconnected; no routing or soldering required. |
| 12 (NC) | No connect | Internally unconnected; no routing or soldering required. |
| 13 (NC) | No connect | Internally unconnected; no routing or soldering required. |
| 14 (NC) | No connect | Internally unconnected; no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ input stage | Enables direct sensing of signals 200mV below VEE or above VCC - eliminates external level shifters in single-supply transducer interfaces. |
| Rail-to-rail output swing | Delivers full supply voltage utilization (e.g., 0–1.8V output range at VCC = 1.8V), maximizing SNR into low-voltage ADCs. |
| Low-power shutdown mode | Reduces total quiescent current to ≤4µA (dual amp), enabling microamp-level system sleep states without external switches. |
| Unity-gain stable to 200pF | Supports direct driving of ADC input capacitance or long traces without external isolation resistors - simplifies layout. |
| No phase reversal on overdrive | Prevents output latch-up during input overload - critical for robust comparator-mode use in fault-detection circuits. |
Applications
| Two-Cell Battery-Powered Systems | Sensor Amplifiers |
|---|---|
Use Scenario: Portable blood glucose meter powered by two AA alkaline cells, operating down to 1.8V end-of-life voltage. IC Role / Device Role / Timing Role: Dual op amp conditions analog output from electrochemical sensor and reference electrode, with one channel in shutdown between measurements. Use Value: 10µA per amplifier and shutdown mode extend battery life beyond 200,000 hours; Beyond-the-Rails inputs accept sensor signals near 0V without level shifting. |
Use Scenario: Low-power digital scale using silicon strain gauges in quarter-bridge configuration. IC Role / Device Role / Timing Role: One amplifier configures as precision instrumentation amplifier (with external resistors), second as reference buffer. Use Value: ±0.20mV input offset and 73dB CMRR reject bridge imbalance and EMI; rail-to-rail output drives 16-bit SAR ADC input fully. |
| Digital Scales | Strain Gauges |
Use Scenario: Consumer kitchen scale with auto-zero and tare functions, requiring stable DC gain over temperature. IC Role / Device Role / Timing Role: Dual amplifier implements differential input stage and low-pass filter for weight signal processing. Use Value: Input offset drift of 2µV/°C minimizes zero-point drift across −10°C to +40°C ambient; 90kHz GBW supports fast settling after tare. |
Use Scenario: Industrial torque sensor with 350Ω foil strain gauge, excited at 5V and read via Wheatstone bridge. IC Role / Device Role / Timing Role: Amplifier A buffers excitation reference; Amplifier B amplifies bridge differential output with gain = 1000. Use Value: 200µV typical VOS and 100kΩ load-compatible output swing ensure <0.1% linearity error; shutdown disables excitation buffer between readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4242ESA | Dual-channel, no shutdown; identical supply range, GBW, offset, and package - but lacks SHDN pin and high-Z output state. | Not suitable for duty-cycled systems requiring periodic amplifier disable; requires external power gating for lowest sleep current. | Select MAX4242ESA only if shutdown functionality is unnecessary and board space allows discrete enable control. |
| TLV2462IDR | Texas Instruments dual op amp: 12µA supply current, 1.8V–6V range, rail-to-rail I/O, but no Beyond-the-Rails input (CMR = VSS to VDD − 0.2V). | Cannot directly interface with signals below ground or above VDD without external biasing; higher input bias current (1pA vs. ±2nA typ) affects high-Z sensor nodes. | Choose TLV2462IDR only when input common-mode range requirements are less stringent and TI supply chain preference applies. |
Compared with MAX4242ESA and TLV2462IDR, the MAX4243ESD uniquely combines dual-channel operation, active shutdown, Beyond-the-Rails input, and guaranteed 1.8V operation - making it the only option among the three that enables true zero-input-voltage sensing and microamp-level system sleep without external circuitry.
Availability
MAX4243ESD is available at Aetrix Electronics and suitable for two-cell battery-powered systems, portable medical devices, digital scales, and strain gauge instrumentation requiring stable component supply across industrial temperature ranges and long-lifecycle production.
Supply support for MAX4243ESD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX4240–MAX4244 family was designed specifically for ultra-low-power, low-voltage precision signal conditioning in battery-constrained systems - emphasizing micropower operation, rail-compatible I/O, and extended common-mode range without sacrificing DC accuracy.
FAQ
What is the maximum operating temperature range for the MAX4243ESD?
The MAX4243ESD is specified and guaranteed over the extended industrial temperature range of −40°C to +85°C. All electrical parameters - including supply current, input offset voltage, CMRR, and output swing - are tested and warranted across this full range, ensuring reliable performance in portable equipment exposed to ambient thermal variation.
Does the MAX4243ESD support true single-supply operation with input signals below ground?
Yes. The MAX4243ESD features Beyond-the-Rails™ inputs with a common-mode range extending to VEE − 0.2V. When VEE = 0V (single-supply ground), the device accepts input voltages down to −0.2V - enabling direct interfacing with transducers whose outputs dip slightly below ground, without external level-shifting circuitry.
How does the shutdown function affect the output state of the MAX4243ESD?
When the SHDN pin is driven low, both amplifiers in the MAX4243ESD enter shutdown mode: supply current drops to ≤2.0µA per amplifier, and both outputs (OUT A and OUT B) transition to a high-impedance (Hi-Z) state. This prevents loading of downstream circuitry and eliminates unintended signal injection during sleep cycles.
Can the MAX4243ESD drive a 10kΩ load rail-to-rail at 1.8V supply?
Yes. The MAX4243ESD is fully guaranteed to drive a 10kΩ load tied to VCC/2 while maintaining rail-to-rail output swing - i.e., VOH ≥ VCC − 40mV and VOL ≤ VEE + 40mV at VCC = 1.8V and TA = +25°C. At temperature extremes, output swing remains within 95mV of rails under same conditions, preserving usable dynamic range.
Is the MAX4243ESD pin-compatible with other devices in the MAX4240–MAX4244 family?
No. The MAX4243ESD uses a 14-pin SO package with dedicated SHDN and NC pins, whereas MAX4242ESA (dual, no shutdown) shares the same 14-pin SO footprint but repurposes pins 9 and 8 as IN+ B and IN− B. MAX4243EUB uses a 10-pin µMAX package. Direct substitution requires PCB redesign unless using the identical MAX4243ESD variant.
MAX4243ESD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Beyond-the-Rails™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 90 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 14µA (x2 Channels)
- Current - Output / Channel:
- 2.5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4243ESD FAQ
1.How can I place an order for MAX4243ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4243ESD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4243ESD reliable?
The price and inventory of MAX4243ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4243ESD is usually 5 days.
3.What payment methods are accepted for MAX4243ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4243ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4243ESD?
MAX4243ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4243ESD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4243ESD?
For technical support, including MAX4243ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4243ESD requirements.
6.How does Aetrix verify that MAX4243ESD is sourced from the original manufacturer or authorized distributors?
All MAX4243ESD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4243ESD meets industry standards.
7.What is the process for return or replacement of MAX4243ESD?
All MAX4243ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4243ESD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4243ESD part is unused and in its original packaging.
Return procedure for MAX4243ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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